to construct, operate, and maintain. in population centers like los angeles, the scope of the task is staggering. the hyperion wastewater treatment plant serves four million people. it processes 350 million gallons of sewage and removes 500 tons of solids daily. after treatment at hyperion, what was once raw sewage is clean enough to release into santa monica bay. other cities and towns release treated wastewater, or effluent, into local rivers, lakes, and streams. as it flows downstream, additional cities may capture it for drinking water, consume it, and treat the water again. in other words, the water coming out of a wastewater treatment plant often enters the watershed, flows into intakes of drinking water treatment plants, and eventually finds its way right back to our faucets.